Tuppence shook her head very energetically.
“Then all I can do is to give you all the information that I can. We have reason to believe that a special agent has been despatched from Moscow to this country. We don’t know what name he is travelling under, we don’t know when he will arrive. But we do know something about him. He is a man who gave us great trouble in the War, a ubiquitous kind of fellow who turned up all over the place where we least wanted him. He is a Russian by birth, and an accomplished linguist—so much so that he can pass as half a dozen other nationalities, including our own. He is also a past master in the art of disguise. And he has brains. It was he who devised the No. 16 code.
“When and how he will turn up, I do not know. But I am fairly certain that he will turn up. We do know this—he was not personally acquainted with the real Mr. Theodore Blunt. I think that he will turn up at your office, on the pretext of a case which he will wish you to take up, and will try you with the passwords. The first, as you know, is the mention of the number sixteen—which is replied to by a sentence containing the same number. The second, which we have only just learnt, is an inquiry as to whether you have ever crossed the Channel. The answer to that is: ‘I was in Berlin on the 13th of last month.’ As far as we know, that is all. I would suggest that you reply correctly, and so endeavor to gain his confidence. Sustain the fiction if you possibly can. But even if he appears to be completely deceived, remain on your guard. Our friend is particularly astute, and can play a double game as well, or better, than you can. But in either case, I hope to get him through you. From this day forward I am adopting special precautions. A dictaphone was installed last night in your office, so that one of my men in the room below will be able to hear everything that passes in your office. In this way, I shall be immediately informed if anything arises, and can take the necessary steps to safeguard you and your wife whilst securing the man I am after.”